Clinton's failures were singled out as being more serious than previous secretaries of state.

Chaffetz, chairman of the House Oversight Committee, said on Outnumbered it's "very uncommon" for a government official not to cooperate with an IG investigation, as Clinton did in this case.

"Past secretaries of state and the current [secretary] all sat down and did interviews. The only one who opted out was Secretary Clinton," he noted, adding that no one at the State Department has been disciplined for the lack of compliance.

He questioned why Clinton would not answer questions when she's repeatedly claimed that she's been fully cooperating.

"If you're trying to clean up your record, you'd go and sit with the inspector general to do that. And in this case, Secretary Clinton refused to do it," said Chaffetz, adding that Clinton must "come clean."

In a tweet, Clinton campaign spokesman Brian Fallon said that the "IG report makes clear her personal email use was not unique at State Dept."

Latest from Fox News Channel

House Intelligence Committee Chairman Adam Schiff of California said that "people have suffered enough" because of President Trump and that a real leader would re-open the part of the government that has been shuttered since December.